From 2c8503f55fbdfbeff4164f133df804cf4d316290 Mon Sep 17 00:00:00 2001 From: Pablo Neira Ayuso Date: Tue, 28 Feb 2012 18:23:31 +0100 Subject: netfilter: nf_conntrack: pass timeout array to l4->new and l4->packet This patch defines a new interface for l4 protocol trackers: unsigned int *(*get_timeouts)(struct net *net); that is used to return the array of unsigned int that contains the timeouts that will be applied for this flow. This is passed to the l4proto->new(...) and l4proto->packet(...) functions to specify the timeout policy. This interface allows per-net global timeout configuration (although only DCCP supports this by now) and it will allow custom custom timeout configuration by means of follow-up patches. Signed-off-by: Pablo Neira Ayuso --- net/ipv6/netfilter/nf_conntrack_proto_icmpv6.c | 13 ++++++++++--- 1 file changed, 10 insertions(+), 3 deletions(-) (limited to 'net/ipv6/netfilter') diff --git a/net/ipv6/netfilter/nf_conntrack_proto_icmpv6.c b/net/ipv6/netfilter/nf_conntrack_proto_icmpv6.c index 7c05e7eacbc6..2eb9751eb7a8 100644 --- a/net/ipv6/netfilter/nf_conntrack_proto_icmpv6.c +++ b/net/ipv6/netfilter/nf_conntrack_proto_icmpv6.c @@ -88,25 +88,31 @@ static int icmpv6_print_tuple(struct seq_file *s, ntohs(tuple->src.u.icmp.id)); } +static unsigned int *icmpv6_get_timeouts(struct net *net) +{ + return &nf_ct_icmpv6_timeout; +} + /* Returns verdict for packet, or -1 for invalid. */ static int icmpv6_packet(struct nf_conn *ct, const struct sk_buff *skb, unsigned int dataoff, enum ip_conntrack_info ctinfo, u_int8_t pf, - unsigned int hooknum) + unsigned int hooknum, + unsigned int *timeout) { /* Do not immediately delete the connection after the first successful reply to avoid excessive conntrackd traffic and also to handle correctly ICMP echo reply duplicates. */ - nf_ct_refresh_acct(ct, ctinfo, skb, nf_ct_icmpv6_timeout); + nf_ct_refresh_acct(ct, ctinfo, skb, *timeout); return NF_ACCEPT; } /* Called when a new connection for this protocol found. */ static bool icmpv6_new(struct nf_conn *ct, const struct sk_buff *skb, - unsigned int dataoff) + unsigned int dataoff, unsigned int *timeouts) { static const u_int8_t valid_new[] = { [ICMPV6_ECHO_REQUEST - 128] = 1, @@ -293,6 +299,7 @@ struct nf_conntrack_l4proto nf_conntrack_l4proto_icmpv6 __read_mostly = .invert_tuple = icmpv6_invert_tuple, .print_tuple = icmpv6_print_tuple, .packet = icmpv6_packet, + .get_timeouts = icmpv6_get_timeouts, .new = icmpv6_new, .error = icmpv6_error, #if defined(CONFIG_NF_CT_NETLINK) || defined(CONFIG_NF_CT_NETLINK_MODULE) -- cgit v1.2.3